People walk in a field of fireweed, or kochia scoparia, at the Hitachi Seaside Park in Hitachinaka, Japan, October 22, 2018. Fireweed is a grass bush that takes on a bright red color in autumn. (Photo by Toru Hanai/Reuters)

Lava erupts from a fissure east of the Leilani Estates subdivision during ongoing eruptions of the Kilauea Volcano in Hawaii, May 13, 2018. (Photo by Terray Sylvester/Reuters)

A man walks with his dog through a forest during a foggy morning in Bern, Switzerland, March 4, 2018. (Photo by Stefan Wermuth/Reuters)

Lightning streaks are seen during a storm over the Auberge de Castille, the office of the Prime Minister Joseph Muscat, in Valletta, Malta, October 19, 2018. (Photo by Darrin Zammit Lupi/Reuters)

Floating dead fish are seen near fish farms at the Euphrates River in Mussayab district, Iraq, November 3, 2018. (Photo by Alaa al-Marjani/Reuters)

The sun rises as spider webs blanket bushes at the banks of Lake Vistonida, Greece, October 19, 2018. (Photo by Alexandros Avramidis/Reuters)

A woman poses for a picture outside the Ice Cave at the Rhone Glacier in Furka, Switzerland, September 13, 2018. (Photo by Denis Balibouse/Reuters)

Bioluminescent phytoplankton is seen along the coastal waters at Big Sur, California, February 5, 2018. (Photo by George Krieger via Reuters)

The Aurora Borealis (Northern Lights) is seen over the sky near Rovaniemi in Lapland, Finland, October 7, 2018. (Photo by Alexander Kuznetsov/Reuters)

A full moon rises behind the Temple of Poseidon before a lunar eclipse in Cape Sounion, near Athens, Greece, July 27, 2018. (Photo by Alkis Konstantinidis/Reuters)

A plastic beach volleyball floats in the Strait of Gibraltar, about 6.8 miles (11 km) from the nearest coast, near Barbate, southern Spain, July 31, 2018. (Photo by Jon Nazca/Reuters)

Damage caused by fire from a burning illegal oil well is seen in Ranto Peureulak, Aceh Province, Indonesia, April 25, 2018. (Photo by Rahmad/Antara Foto via Reuters)